◆ 24K LABS THE GOLD‑402 INDEX

505 curated x402 services, every one live‑knocked before it was listed. 484 carry a dated knock; most recent . A knock is one HTTP request that got an answer — it is not a delivery test. Read a stamp as reachable and speaks the protocol, never as worth the money.

01 APIs & Services 156

  • Venice AI Official Venice AI client for x402 micropayments.
  • 24K Labs Chronographer Temporal context for AI agents: 15+ time systems (lunar, solar, market sessions, circadian, I…
  • tx402.ai Agent-native LLM inference gateway.
  • AskClaude Pay-per-query Claude API.
  • x402engine 74 pay-per-call API tools: 44 LLMs, image/video generation, crypto data, web search, code exe…
  • x402 AI API — zeroreader 29 Cloudflare Workers AI models (LLM, Embeddings, Image Generation, Audio, Translation) via x…
  • GPU-Bridge 30-service GPU inference: LLM, image generation, embeddings, STT, TTS, PDF processing in one…
  • MOSS Agent AI-powered coding services: code review ($0.005), translation ($0.003), code explanation ($0.…
  • SkillMint 51 AI skills across 7 categories (dev tools, creative design, research, writing, docs).
  • Obol AI code generation via x402.
  • agentsvc.io 20 utility tools for AI agents: `ip-lookup`, `dns-lookup`, `qr-code`, `exchange-rates`, `emai…
  • DevDrops 22 pay-per-query data APIs: prediction markets (Polymarket + Manifold), property intelligence…
  • Aigregator Structured data on 5,336+ AI tools via REST API and MCP server.
  • Xquik Real-time X (Twitter) data API.
  • Content Intelligence API AI-powered web content extraction and analysis.
  • panevin-x402-api Web content extraction and AI processing.
  • Scout MCP Multi-source search across code, academic, social, community platforms.
  • AnyBrowse Autonomous web browsing agent.
  • Fly Labs Agentic Market YouTube data APIs for AI agents.
  • GigSoul AI Research Agent 23-endpoint AI research API: SEC filings, earnings calls, competitor analysis, market researc…
  • AgentData API Real-time crypto market data.
  • Polybot Arb Intelligence Real-time cross-platform prediction market arb data (Polymarket + Kalshi + Myriad).
  • Tick Aggregator API Multi-source aggregated FX Best Bid/Ask from 3 institutional liquidity providers.
  • DeFi Intelligence API Unified DeFi security, bridging, analytics.
  • MoonMaker API AI-native crypto intelligence.
  • DeepBlue Trading API AI-powered crypto intelligence from an autonomous trading team running real money on Polymarket.
  • MoltGuard Agent trust scoring, Sybil detection, Polymarket integrity, Ed25519 Verifiable Credentials.
  • Hodler DeFi Intelligence Stablecoin monitoring, redeem arbitrage, cross-chain pair discovery across 10 EVM chains.
  • AlphaClaw Autonomous alpha hunting on Polymarket and DeFi.
  • SolSignal API Solana token safety scanner.
  • Automaton Oracle Sovereign crypto intelligence: real-time prices, global macro intelligence, pump.fun graduati…
  • SignalFuse Trading intelligence + x402 API gateway.
  • Sentinel x402-gated trust verification for autonomous agents.
  • x402-api Pay-per-call DeFi & crypto data.
  • CryptoSignalBot x402-gated crypto volume anomaly scanner.
  • SIBYL Crypto intelligence agent on Base.
  • Crysha Price Oracle Aggregated crypto prices (multi-source BTC/others).
  • Polymarket Liquidity API Real-time Polymarket liquidity data.
  • Polymarket Scan API Automated Polymarket scanner detecting liquidity anomalies.
  • Moltalyzer Four AI intelligence feeds: hourly Moltbook community digests, daily GitHub trending repos, P…
  • Mercury402 Pay-per-call U.S.
  • Gotobi Calendar API Japanese FX gotobi date intelligence for trading agents.
  • PreReason Financial context API.
  • KR Crypto Intelligence Korean crypto market data.
  • CrossFin 15 paid Korean market data APIs (Kimchi Premium, KOSPI, Bithumb, Upbit, Coinone, FX, headline…
  • Visual API Screenshot and PDF capture API.
  • geo-gateway Pay-per-call Mapbox geospatial proxy.
  • PortsideLabs Places API Google Places API v1 proxy.
  • Domain Intelligence API 8-endpoint domain analysis: WHOIS, multi-resolver DNS, SSL/TLS grading, Wappalyzer tech stack…
  • Weather API Global weather data for AI agents.
  • Bloomfilter x402-powered domain registration API for AI agents.
  • Find Domain Domain research API.
  • Mailcheck API Email validation: syntax, MX records, disposable domain detection, free provider check, role-…
  • ShieldAPI Security intelligence for AI agents.
  • AEO Scanner (Convrgent) AI search visibility audit for any website.
  • CYBERA Compliance API Crypto compliance suite.
  • Strale Trust layer for AI agents with 250+ independently tested business data and compliance capabil…
  • Intel API AI-synthesized token due diligence.
  • PayAPI Market First marketplace for x402-powered APIs.
  • Kerdos Market Intelligence AI market intelligence for agents and traders.
  • Arch Tools 58 production API tools for AI agents.
  • dTelecom STT Real-time speech-to-text API.
  • Coinnect Money transfer routing API.
  • Know Your Human (Convrgent) Personality intelligence API.
  • KnowMint Open-source knowledge marketplace.
  • Stockfilm 217,000+ authentic vintage 8mm home movie clips (1930s-1980s) restored in 4K.
  • AgentPay Real-world service booking via x402 + Stripe.
  • CentRake Universal calculator with 3-layer self-correcting verification.
  • AIsa Leading x402 payment processor.
  • Coinbase Developer Platform Official CDP implementation processing hundreds of thousands of transactions weekly.
  • Cloudflare Workers Edge payment verification at scale across 300+ data centers globally.
  • x402 Entity-ID Resolver Resolves a company or crypto name or ticker into ranked entities with verified canonical IDs…
  • _done Suite of x402 micropayment-gated utility APIs for AI agents (web lookups, site analysis, data…
  • PulseNetwork Federated catalog of 950+ pay-per-call intelligence endpoints across 76 origins: token safety…
  • JMT x402 Agent Tools 25 endpoints: web search, AI analysis, crypto/stock data, SEC filings, company intel, news, s…
  • Vindex Vehicle-data API: VIN decode with factory warranty terms, recalls, known-issues/reliability,…
  • AgentServices Paid data APIs for AI agents: crypto prices, technical indicators, DeFi yields, IP geolocatio…
  • Isocast Per-signal Polymarket weather-market data across 37 cities.
  • SolSigs 20 pay-per-call Solana blockchain intelligence APIs: DEX prices, arbitrage scanner, wallet in…
  • LoneStarOracle 43 pay-per-call data APIs: token and wallet risk scoring, smart-contract security audits, wha…
  • TokenGuard ERC-20 rug/safety scanner over public RPC on 6 chains (Base, Ethereum, Arbitrum, Optimism, Po…
  • Tollbooth 56 financial, tax, and legal calculators for AI agents (income tax, self-employment/estimated…
  • DDG Agent-Payable Services Machine-readable security and commerce primitives for AI agents.
  • Agent Ready Website agent-readability scanner.
  • Skill Audit Malicious-pattern detection for AI agent skills, plugins and prompts.
  • Contract Guard Pre-interaction EVM contract risk signals: EOA/contract/self-destructed status, EIP-7702 dele…
  • WebberSites x402 Data API 41 pay-per-call endpoints for AI agents: web scraping, document extraction, whole-site SEO au…
  • NodeFlare Pay-per-request JSON-RPC on 23 EVM chains (including Robinhood Chain, Plasma, Ink and Zircuit…
  • Dokimo Verify API Pay-per-call x402 endpoint that independently verifies a Merkle evidence proof to its committ…
  • Grey Ridge Signals — x402 Data & Security APIs 17 agent-native pay-per-call endpoints: blockchain queries (balance, gas, code, receipts, tok…
  • GenTech x402 Gateway 15 pay-per-call endpoints for crypto intelligence, wallet analysis, token risk scoring, NFT s…
  • Venture NL Open-Data Dutch open-government data: RDW vehicle registry, BAG addresses/buildings, postcode/geocoding…
  • Groundcheck Claim grounding and delivery attestation for AI agents: machine-verified verdicts (supported/…
  • x402-seller Token rug/honeypot scoring combining GoPlus static analysis with live Honeypot.is sell simula…
  • Fabler Labs x402 Storefront Security and utility APIs for AI agents on Base, USDC per call, no signup: secret scan ($0.00…
  • Mart402 Web and PDF extraction for AI agents: URL-to-Markdown extraction, PDF parsing with dual-engin…
  • DeskCrew Agent-native helpdesk.
  • Zugabot Code Agent AI developer services via x402: code review ($0.25), bug fix ($0.25), security audit ($0.50),…
  • Base tx-decision Submit-now-or-wait decision plus EIP-1559 fee sizing for Base mainnet transactions, computed…
  • Stelar Digital Live crypto grid-trading telemetry (real P&L, not simulated), grid-parameter recommendations,…
  • Macro Pulse Pay-per-call macroeconomic indicator API sourced from the World Bank (GDP growth, inflation,…
  • Zugabot Image Generation Text-to-image generation via x402: FLUX Schnell ($0.15) or FLUX 2 Pro ($0.50), returns image…
  • modelprices.xyz Normalized LLM market data: per-token prices, context windows, and capability limits for 2,00…
  • AVT x402 Data Services 16 pay-per-call data and validation APIs: field-verified AV/IT device-integration knowledge b…
  • Visibility AI Audit API AI-visibility and AEO audit for websites: agent-readiness scoring (llms.txt, schema, bot acce…
  • The Bot Wire 57 primary-source data wires for AI agents: SEC EDGAR, Federal Register, federal court opinio…
  • GBLIN Protocol Treasury and risk data for a NAV-backed basket token on Base (cbBTC/WETH/USDC) with an automa…
  • BridgeNode OpenAI-compatible LLM inference bridge: 38 models (GLM, Kimi, MiniMax, DeepSeek, GPT-OSS), ch…
  • US City Open-Data Compliance Network Multi-jurisdiction property compliance for AI agents ($0.01 USDC on Base): catalog https://x4…
  • OyaPicks Cross-venue prediction market data for AI agents: 11 endpoints covering keyword market search…
  • Data Quality Gate Deterministic post-scrape data cleaner: repairs how data was encoded — residual HTML, mojibak…
  • Node Scorecard API Scored directory of Sentinel dVPN network nodes: composite score per node, sorted best-first,…
  • ECB FX Reference Converts amounts across ECB-supported currencies from the European Central Bank's daily euro…
  • IBANforge Pre-payout IBAN screening: validation + issuing-bank identification against 6 national bank r…
  • Rue Render API Renders a URL or raw HTML to PDF, PNG, or JPEG via headless Chromium, SSRF-guarded.
  • Mossgate Trust API Onchain risk checks for Base ERC-20 tokens and wallets: token verdict returns ok/caution/dang…
  • 402PIXEL AI-agent-only territory game on a shared 402-tile board.
  • Gondola Pay-per-request LLM inference over x402 (OpenAI-compatible chat, images, and Anthropic messag…
  • BlinkCodes Storefront selling real-world digital goods to agents: gift card codes (Steam, Razer Gold, PS…
  • apix402 Sixteen paid endpoints for agents, each answering against the source that decides rather than…
  • Colombia TRM Official Superintendencia Financiera daily USD/COP TRM as prepaid x402 at $0.005 USDC on Base.
  • Smart Event Scraper Aggregates events from Eventbrite, Meetup, AllEvents, District, EventsEye, and ConferenceAler…
  • Circadian Web data extraction for agents, run as a disclosed autonomous AI-agent business: page-to-Mark…
  • Forge Launch Signals Live pump.fun launch-signal feed: up to 100 newest launches with normalized screening verdict…
  • fetchx402 Network utilities for agents: DNS, SSL, WHOIS (RDAP), HTTP headers, redirect tracing, host-in…
  • CapGain safety and work artifacts EVM token risk and Base swap preflights from $0.01, plus machine-buyable invariant tests ($0.…
  • Forge Attestation Signed third-party evidence records for x402 transactions, where every claim is labelled `wit…
  • TaskMarket Data API — Read-only TaskMarket bounty-market data for AI agents: list open tasks (rewards, deadlines, s…
  • MCPFax Public-Data Utility — 31 keyless public-data endpoints for AI agents: geocoding, weather, air quality, VIN decode,…
  • Animica Research — One call that searches the web, fetches the top pages and returns their readable text with ev…
  • Black Label Continuum Audit — Scores eight self-declared AI-agent continuity capabilities and returns a deterministic 0–100…
  • Feeless402 — Reference pay-per-call endpoint settling in Nano (XNO): GET /premium answers a v2 402 at 0.00…
  • BlockLabs Catalog — Dropshipping storefront selling physical products to agents: 300,000+ item catalog, paid full…
  • Verdoc — Deterministic AGENTS.md generator for public GitHub repositories: build and test commands quo…
  • TinyOps Automation Integration Preflight Inspects a public webpage for automation readiness: integration links, forms, robots policy,…
  • Clear Fetch one public URL as markdown from the public HTML (Readability + Turndown).
  • PayPerByte Eleven pay-per-call USDC data feeds and oracles on Base mainnet: weather, earthquakes, CCTP v…
  • GPT55 Model Gateway OpenAI-compatible GPT-5.6 Luna Standard chat completions via x402 USDC on Base for $0.00293 p…
  • Calibrated Similarity Search API Stateless NMI + cosine fusion similarity search over pre-computed numeric vectors, with an en…
  • Viraill Generative Engine Optimization (GEO) and Agentic Commerce Readiness APIs for AI agents and Sa…
  • On-Chain Activity Index 0-100 quantitative DeFi Protocol Activity Index computed from real public DefiLlama data (TVL…
  • Live Entity Verification API Cross-signal Bayesian corroboration of entity existence: fuses WHOIS, Certificate Transparenc…
  • x402 Receipt Verifier Audits NEXUS's own x402 payment logs against its own delivery logs and issues a signed HMAC r…
  • ERC-8004 Agent Liveness Checks whether an agent registered in the real ERC-8004 Identity Registry (Base Sepolia testn…
  • Public Tenders ES/EU Normalized search over public-sector tenders published in TED (EU official procurement notice…
  • WebSocket Session Manager API Stateful WebSocket session registry that proxies a connection to a target URL and scores each…
  • New x402 Listings Feed Feed of x402/L402 services newly listed on 402index.io within a caller-specified recency wind…
  • CONNSKILL Growth Services Growth infrastructure for AI agents: SEO/SERP research (Google SERP reports, keyword volume/C…
  • M0 URL Extraction Fetch a public URL, get back clean machine-consumable text (HTML noise stripped, SSRF-guarded).
  • Fetchgate Agent-facing storefront + web-reader API on Cloudflare Workers.
  • BNM Data Shop Official public-data caches on 37 paid GET routes (FDA, USDA, USCG, and US/UK/EU/Canadian age…
  • Saylor Watchdog Solana token intelligence: price/liquidity spread across two independent sources, security fl…
  • csno Provably-fair coinflip, dice, and European roulette for agents: `POST /api/csno/chips` answer…
  • Citable — SEO and AI-visibility data on 17 paid GET routes: keyword research, on-page audits, AI-citati…
  • Israel Company Verify — Verifies Israeli companies against structured public-registry data and returns evidence for $…
  • Sourcey Startup Credits Review — Human review of one startup-program submission against Sourcey's public evidence and Catalog…

02 MCP Servers 61

  • blockrun-mcp Live data MCP for AI agents: search, research, markets, crypto, X/Twitter.
  • MetaMask MCP x402 Official MetaMask MCP server with x402 payment integration.
  • x402-mcp Vercel's `paidTool` primitive — add an x402 paywall to any MCP tool with one wrapper.
  • agentsvc.io MCP 20 pay-per-call utility tools: screenshots (Playwright), OCR (Tesseract), PDF generation, web…
  • Spraay MCP 60+ tool MCP server for multi-chain DeFi payments: batch sends, payroll, token swaps, bridge,…
  • EntRoute MCP Discover and call 350+ verified x402 API endpoints across 110+ capabilities.
  • Pylon MCP 20-tool MCP server: web extraction, search, translation, code execution, image generation, em…
  • Apollo Intelligence MCP 26-tool MCP server: intelligence feeds, crypto, OSINT, DeFi, proxy, and search.
  • APIbase.pro MCP gateway with 263+ tools from 74 providers, x402 USDC micropayments on Base.
  • x402engine MCP 74 pay-per-call API tools: 44 LLMs, image/video generation, crypto data, web search, code exe…
  • APIMesh MCP 16-tool MCP server for web analysis: SEO, security headers, Core Web Vitals, domain availabil…
  • AskClaude MCP Pay-per-query Claude AI.
  • JubJub MCP 65-tool MCP server for media publishing, cross-platform analytics, automated on-chain royalty…
  • Human Pages MCP 31-tool MCP for the open directory AI agents use to hire humans for real-world tasks.
  • Cerebrus Pulse MCP Real-time crypto intelligence: technical analysis (RSI, EMAs, Bollinger Bands), sentiment, fu…
  • BotIndex MCP 17-tool signal intelligence: sports odds, crypto correlations, token graduations (Zora/Hyperl…
  • Harvey Intel Solana token rug pull detection (DrainBrain ML ensemble), trading signals, social intelligence.
  • Harvey Tools Web scraping, screenshots, structured data extraction, code review, content generation, senti…
  • Harvey Verify Post-transaction outcome verification using LLM-as-judge.
  • Harvey Budget Agent spending management: budget tracking, ROI analysis, spend approval.
  • ShieldAPI MCP 9-tool security MCP: password breach, email breach, domain/IP reputation, URL safety, full se…
  • MCP Security Snapshot Server Pay-per-call HTTP security header scanning.
  • 24K Labs API 143 pay-per-call endpoints on one x402 v2 server, no account or API key: AI code work (explai…
  • Stack AI x402 Platform for monetizing MCP servers.
  • PYTHIA Oracle Oracle MCP server.
  • ALTER MCP Identity infrastructure MCP for the AI economy.
  • Azeth MCP x402 payment tool (`azeth_pay`), ERC-8004 trust registry discovery, on-chain reputation scori…
  • MoltGuard Agent trust scoring (0-100), Sybil detection, Polymarket integrity, Ed25519 Verifiable Creden…
  • PayCrow Escrow protection for autonomous agent payments.
  • Arbitova Escrow + transparent AI arbitration (N=3 LLM majority vote).
  • PayBot MCP Claude and AI agents make autonomous x402 payments.
  • agentpay-mcp Native x402 client-side payment execution inside the agent loop.
  • 402-mcp Payment-rail-agnostic x402 MCP client.
  • x402search MCP Search 14,000+ x402-enabled HTTP APIs by keyword.
  • x402 Service Discovery MCP MCP for discovering 251+ x402-payable services with quality signals (uptime, latency, trust s…
  • Intelligence Aeternum Monetized MCP server marketplace.
  • InstaDomain Domain registration accepting x402.
  • Recall Kitchen Search food/product/vehicle recalls.
  • x402 Wallet for Claude Desktop Native Claude Desktop extension (.mcpb one-click install).
  • Scout MCP Multi-source search across code, academic, social, community platforms.
  • TweetClaw Real-time X (Twitter) data.
  • Stockfilm MCP 217,000+ authentic vintage 8mm home movie clips (1930s-1980s) restored in 4K.
  • ToolOracle x402 entitlement gateway with 10 intelligence products and 90+ MCP tools: RankOracle (SEO), S…
  • vindex-mcp Vehicle data over x402: VIN decode with warranty terms, recalls, reliability, and US/Canada p…
  • SolSigs MCP 16-tool Solana blockchain intelligence MCP server: DEX prices, arbitrage, wallet scoring, tok…
  • isocast-mcp Per-signal Polymarket weather-market data across 37 cities, with market URLs and live bucket…
  • moltalyzer-mcp Polymarket and AI-agent-community intelligence: order-book microstructure movers, whale hold-…
  • lso-mcp 46 LoneStarOracle data tools: token and wallet risk, contract audits, whale tracking, DeFi an…
  • Apiosk MCP gateway to discover, pay for, execute, and publish x402 APIs.
  • 402Found Marketplace of 18 specialized AI agent microservices: PII scrubbing, hallucination detection,…
  • Razorpay MCP Server Official MCP server from one of India's largest payment processors.
  • Fry x402 MCP MCP server for the fry.farm x402 API.
  • botwire-mcp The Bot Wire as MCP tools: 57 real-time primary-source wires (SEC EDGAR, Federal Register, fe…
  • BridgeNode MCP x402-gated AI inference MCP server: chat completions + model listing across 38 models, automa…
  • AgentFund US Economic, SEC & On-Chain Data 21 tools over US government data and public chain state: Treasury yield curve, CPI, PCE, jobs…
  • Andreax Remote MCP server with 54 pay-per-call AI tools: prompt compression, inference, web/PDF read,…
  • BlockLabs Shop MCP — Mounts the BlockLabs physical-goods shop as MCP tools: paid product search, free order quotes…
  • Cheapest Grocery Basket — Whole-list grocery optimization: send a shopping list and a ZIP, get what it costs at each ne…
  • PayPerByte MCP 15-tool MCP server for the PayPerByte x402 gateway: pay-per-call USDC data feeds and KYA scre…
  • Cleared Index MCP MCP server (`route_gateway`, check, trust, witness) so agents query attested inventory and ro…
  • OrbitWan.io MCP 24-tool Wanchain explorer MCP server from an independent archive node: addresses, transaction…

03 Ecosystem 49

  • x402 The canonical x402 protocol repository maintained by the x402 Foundation under the Linux Foun…
  • x402scan x402 Ecosystem Explorer by Merit Systems.
  • Awesome Agentic Commerce Curated resources for the x402 ecosystem by Merit Systems.
  • Coinbase Developer Platform Hosted facilitator service with enterprise-grade reliability and instant settlement.
  • Cloudflare x402 Edge payment processing across 300+ global data centers.
  • Polygon Agentic Payments Near-instant finality, sub-$0.001 fees, no reorgs.
  • Finance District Prism Payment gateway for agentic commerce.
  • thirdweb Nebula AI agent transaction framework on x402.
  • MoltsPay Open payment protocol for AI agents.
  • Bermuda ZK-private HTTP payments for x402.
  • XyncPay Protocol translation layer bridging x402, MPP, and AP2.
  • RustChain Decentralized PoS blockchain with native x402 for AI agent micropayments.
  • EntRoute Machine-first API discovery for AI agents.
  • CardZero ERC-4337 smart contract wallets for AI agents.
  • Coinbase Agentic Wallets Wallet infrastructure purpose-built for autonomous AI agents.
  • ATXP Agent identity and funding platform.
  • OpenVPS AI-agent VPS hosting.
  • Franklin The AI agent with a wallet — spends USDC autonomously to get real work done.
  • Lucid Agents Commerce SDK by Daydreams.
  • Agenti Give any AI agent a crypto wallet.
  • Faremeter Universal framework for transparent API cost integration into agent workflows.
  • mcpay Open-source infrastructure for MCP and x402.
  • use-agently Routing and settlement layer for AI agents.
  • Vault-0 Encrypted secret vault, agent monitor, and x402 wallet for OpenClaw.
  • Nevermined Integrated Visa Intelligent Commerce + x402 for autonomous AI agent commerce (April 9, 2026).
  • Phidata Agents Multi-modal agents with x402 integration.
  • NEAR AI Cross-chain agent settlements.
  • World AgentKit Integrates World's WorldID biometric identity with x402.
  • Google A2A x402 Extension Agent commerce protocol.
  • Revettr Counterparty risk scoring API for x402 agentic commerce.
  • SwarmX Multi-agent AI orchestration with native x402 micropayments on Solana.
  • Agent.market x402 Foundation's official app store for agents.
  • payagent Drop-in `fetch` wrapper that auto-handles HTTP 402 responses.
  • AlphaClaw Autonomous AI agent network hunting alpha on Polymarket and DeFi.
  • WorkProtocol Open job marketplace where AI agents find structured work, deliver artifacts, and get paid in…
  • MAXIA AI-to-AI marketplace implementing x402 V2 micropayments on Solana and Base for autonomous age…
  • AgentStore Open-source marketplace for Claude Code plugins with x402 USDC payments, 80/20 publisher reve…
  • x402 Bazaar Decentralized API marketplace with 69 native x402-payable endpoints.
  • Satring Curated L402 + x402 API directory with human ratings, health monitoring, MCP server.
  • x402-audio-to-audio Transmits signed USDC payments over sound using a custom OOK audio modem with Goertzel DSP.
  • x402charity Open-source micro-donation server powered by x402.
  • AP2 — Agent Payments Protocol Apache-2.0 authorization layer sitting above payment rails, built on signed user mandates.
  • Agent Commerce Kit (ACK) MIT-licensed DID and verifiable-credential toolkit for agent identity.
  • Skyfire Agent identity and payment credentials as ES256 JWTs with a public JWKS endpoint.
  • Official MCP Registry The canonical registry for the Model Context Protocol.
  • Glama MCP registry indexing 64,239 servers, and the only one that publishes both its scoring rubric…
  • minia2a.uk Open M2M micropayment marketplace.
  • Animica Agent Job Network — Agents post tasks with a USDC budget and other agents perform them for payment;
  • Frantic — Bounty board where AI agents claim funded work, deliver artifacts in the open, and are paid i…

04 SDKs & Libraries 46

  • x402-openai-python Drop-in OpenAI Python client with transparent x402 payment support.
  • x402-openai-typescript Drop-in OpenAI TypeScript client with transparent x402 payment support.
  • a2a-x402-typescript Complete TypeScript implementation combining Google's A2A protocol with x402 payments.
  • use-agently Routing and settlement layer for AI agents.
  • x402-typescript Official TypeScript implementation.
  • cipher-x402-client Lightweight TS/JS x402 v2 client.
  • x402-got Got HTTP client integration for x402.
  • x402-mcp Vercel's library for adding x402 paywalls to MCP servers via the AI SDK.
  • PayBot SDK TypeScript SDK for integrating x402 into AI agents and bots.
  • ClawPay MCP Non-custodial x402 payment layer for AI agents.
  • Azeth SDK TypeScript SDK with x402 client (`fetch402`), ERC-4337 smart accounts, on-chain reputation fe…
  • MoltsPay Payment infrastructure for AI agents.
  • PRXVT Privacy SDK Privacy layer for x402.
  • Agent Wallet SDK Non-custodial smart contract wallets for AI agents.
  • viem TypeScript library used for signing x402 payments.
  • ethers.js Alternative Ethereum library for signing.
  • x402 Official Python SDK.
  • ag402 Payment layer for AI agents using x402.
  • open402 Wire-compatible protocol layer of the ag402 project.
  • primer-x402 Python SDK for x402 payments — pay and charge for APIs with stablecoins.
  • x402-pay Call any x402 API with one API key.
  • MoltsPay Python Python SDK for x402 agent payments.
  • x402 Payment Harness Python library + CLI for x402 without Coinbase CDP wallet.
  • x402-mock Test/mock implementation of x402 for EVM blockchains.
  • xrpl-x402-core Wire-level validation with CAIP-2 XRPL identifiers.
  • xrpl-x402-client Buyer-side Python SDK with `wrap_httpx_with_xrpl_payment`.
  • xrpl-x402-middleware Server-side middleware with `require_payment()`.
  • r402 Rust SDK for the x402 payment protocol by qntx.
  • ra2a Rust SDK for the Agent2Agent (A2A) Protocol with x402 integration.
  • x402-rs Production-grade Rust implementation.
  • x402-kit Fully modular, framework-agnostic Rust SDK.
  • alloy High-performance Ethereum library used for Rust x402 signing.
  • x402-foundation/x402 (Go) Official Go implementation.
  • x402-go Community Go implementation by Mark III Labs.
  • mcp-go-x402 x402 payment transport for MCP-Go clients and servers.
  • Mogami Production-ready Java x402 stack.
  • x402-dotnet x402 Payment Protocol implementation for .NET.
  • genlayer-x402 x402 for GenLayer Intelligent Contracts.
  • Spillway Subscription payment channels on Stellar using x402.
  • Solana Foundation Pay Official Solana Foundation library for handling x402 and MPP payment challenges with user-aut…
  • pay-kit Agentic commerce building blocks (x402, MPP, AP2) for TypeScript, Rust, Go, Python.
  • bridgenode-llm Drop-in OpenAI Python client with automatic x402 payment support on Solana USDC: gasless, no…
  • @bridgenode/llm Drop-in OpenAI TypeScript client with automatic x402 payment support on Solana USDC: gasless,…
  • feeless402 — Client and merchant server for x402 over the Nano (XNO) rail: CLI pays any x402 v2 endpoint,…
  • tryx402 — Budget router and execution gateway over x402: hard session budget caps, idempotent paid call…
  • solana-x402 Zero-dependency x402 resource server for Solana.

05 Learning Resources 45

06 Tools & Utilities 42

  • mcpc Universal CLI client for MCP by Apify.
  • portal-tunnel Publishes localhost services to the agentic web through self-hostable, trustless tunnels with…
  • x402-payment-link Generate shareable x402 payment links.
  • tweazy Monetize AI applications and MCP servers using x402, CDP Smart Wallets, and Coinbase AgentKit.
  • x402-proxy `curl` for x402 paid APIs.
  • ClawRouter Agent-native LLM router.
  • key0 Commercial gateway for AI agents.
  • World AgentKit Developer toolkit integrating World's WorldID biometric identity with x402.
  • Red Team Blue Team Agent Fabric Security testing harness for autonomous AI agents with dedicated x402 endpoint testing.
  • 24K Labs GitHub Action Automated AI code review on every PR.
  • Obol GitHub Actions CI/CD Obol generates GitHub Actions CI/CD pipelines via x402.
  • Sentinel/Valeo Enterprise audit and compliance layer for x402 payments.
  • ScoutScore Trust scoring infrastructure for x402 services.
  • x402scan Explorer Blockchain explorer for x402 payments.
  • Agent Forensics Agent cost observability for Claude Code.
  • Valoria x402 market intelligence with revenue rankings, service analysis, pricing data across 90K+ in…
  • x402station Real-time monitoring and discovery platform for 20,000+ x402 endpoints.
  • ToolMeter MCP/x402 seller-readiness tool with pricing metadata, `.well-known/x402`, OpenAPI, agent meta…
  • agenteconomy.to Real-time dashboard tracking agentic economy across x402, ERC-8004, ERC-8183, and MPP protoco…
  • Dune Analytics x402 On-chain metrics: transaction volumes, chain-by-chain analytics, facilitator comparison, reve…
  • Paybound Open-source governance proxy for x402 agent payments.
  • PolicyLayer Non-custodial spending controls for AI agents.
  • ICME Labs Formal verification for AI agent actions.
  • PaySentry Control plane for AI agent payments.
  • Decision Anchor External anchoring layer for agent payments and delegation.
  • x402-mock Test/mock implementation of x402 for EVM blockchains.
  • AWS CloudFront x402 content monetization sample AWS-published reference implementation for monetizing content behind CloudFront and WAF using…
  • Base Sepolia Testnet Primary testnet for x402 development.
  • Base Sepolia USDC Faucet Get test USDC for development.
  • Base Sepolia Bridge Bridge test ETH to Base Sepolia.
  • x402 Service Discovery API Enriched directory of 251+ x402-payable services.
  • x402 RouteNet Smart routing layer for x402-enabled services.
  • OpenClaw Discovery Index x402-gated search engine for 13,000+ x402-enabled APIs indexed from CDP Bazaar.
  • AgentIndex Unified search across 15,000+ MCP services, A2A agents, and x402 APIs from 5 registries (Smit…
  • Cinderwright Discovery Hub x402 service search engine.
  • BlockRun AI Gateway + Service Directory.
  • x402search MCP Search 14,000+ x402-enabled HTTP APIs.
  • agent.pw Self-hostable MIT credential vault for agent API keys and OAuth tokens.
  • Agent Café x402 developer service with published API documentation.
  • bridgenode CLI for x402-paid LLM inference on Solana: chat completions + model listing with automatic US…
  • Animica x402 Index — Full-text search over ~18,000 machine-payable services indexed from their own 402 challenges…
  • nohumans.directory — Directory of paid x402 APIs and datasets with continuous 402 probing plus paid delivery verif…

07 Security 27

  • EIP-3009 Security Analysis Security considerations for TransferWithAuthorization.
  • CVE Database Known vulnerabilities and patches for the x402 protocol.
  • Payment Verification Guide Proper payment verification: facilitator trust models, on-chain verification fallbacks, amoun…
  • ShieldAPI x402-native security intelligence API.
  • stripe-mcps Trust verification + AML sanctions screening before Stripe/x402 payments.
  • KaelAi Wallet trust scoring API for the agentic economy.
  • PaySentry Control plane for AI agent payments.
  • Sentinel/Valeo Enterprise audit layer.
  • Paybound Open-source governance proxy for x402 agent payments.
  • PolicyLayer Non-custodial spending controls for AI agents.
  • ICME Labs Formal verification for AI agent actions.
  • Decision Anchor External anchoring layer for accountability before x402 payment execution.
  • Revettr Counterparty risk scoring for x402 agentic commerce.
  • MoltGuard Agent trust scoring (0-100), Sybil detection with funding cluster analysis, Polymarket integr…
  • ScoutScore Trust scoring for x402 services.
  • CYBERA Compliance API VASP address identification (20,468 addresses, 29 chains), risk scoring, sanctions/mixer scre…
  • SENTINEL AML/CFT compliance intelligence.
  • Coinbase Bug Bounty Report x402 vulnerabilities for rewards up to $50,000.
  • Immunefi x402 Program Decentralized bug bounty platform with x402 listings.
  • Hermes Plant Action Safety Deterministic pre-execution gate for agent shell, Git, SQL, infrastructure, and deployment ac…
  • Viridis MCP Security Preflight Deterministic static preflight for caller-supplied MCP manifests that checks endpoint and aut…
  • x402 Trust Autonomous trust and reliability scoring for every publicly listed x402 endpoint, derived fro…
  • x402 Manifest Check Zero-dependency Python CLI and live x402-paid API for static manifest checks covering network…
  • TaskMarket Trust Score Requester reputation scoring for TaskMarket (taskmarket.dev): given a requester wallet addres…
  • Cleared Index Trust provider and verification index with a conformant trust-evaluation endpoint: `POST /api…
  • DopamineDesk Transaction Preflight — Checks an unsigned EVM transaction for simulation errors, gas, proxy evidence, and optional t…
  • x402 Checker (Nock) Free `GET /check?url=` honesty probe of a live x402 URL plus free `GET /board` (pay-to-rank,…

08 Facilitators 22

  • Coinbase CDP Official facilitator on Base and Base Sepolia.
  • Stripe x402 Stripe's Machine Payments infrastructure.
  • Cloudflare x402 Edge computing facilitator on Base and Ethereum.
  • Polygon x402 Facilitator Coinbase CDP on Polygon with gas sponsorship, automated KYT compliance screening, 1,000 free…
  • Stellar x402 Official Stellar Foundation integration.
  • AsterPay European x402 facilitator with EUR off-ramp via SEPA Instant.
  • Primev FastRPC Fee-free facilitator on Ethereum mainnet with sub-200ms settlement via [mev-commit](https://m…
  • Bankr x402 Cloud Hosted platform for deploying USDC-monetized pay-per-request APIs.
  • Dexter DAO Open-source x402 facilitator and SDK.
  • Ultravioleta DAO Multi-chain hosted facilitator supporting 33+ networks including EVM, Solana, NEAR, Stellar,…
  • BNB Chain Pieverse BNB Chain x402 facilitator using pieUSD (a 1:1 USDT wrapper) to enable EIP-3009 gasless payme…
  • MERX x402 for TRON First TRON facilitator.
  • XRPL / t54.ai Facilitator x402 facilitator for XRP Ledger by t54.ai, supporting native XRP and RLUSD payments.
  • x402 Sponsor Relay x402 sponsor relay for AI on Bitcoin (aibtcdev).
  • Satoshi Facilitator Independent facilitator for Bitcoin-focused pay-per-call services.
  • x402-sovereign Self-hosted x402 facilitator.
  • qntx/facilitator Production-ready x402 facilitator server by qntx.
  • OpenZeppelin Relayer x402 Plugin x402 facilitator plugin for OpenZeppelin Relayer.
  • x402-rs Facilitator Production-grade Rust self-hosted facilitator.
  • @facilitator/eip7702 Supports all EVM blockchains (BNB, Polygon, etc.), all tokens (USDT, DAI, WBTC, etc.), and na…
  • NEAR x402 Facilitator Open-source, API-key-gated facilitator for exact Circle USDC payments on NEAR and Base.
  • ArisPay Free, public x402 facilitator on Base mainnet with USDC and EURC settlement.

09 Global Agent Economy 18

  • Coze ByteDance's agent-building platform ([coze.cn](https://www.coze.cn) for the domestic market).
  • Dify Open-source platform for production agentic workflows, Chinese-origin with broad internationa…
  • AgentScope Agent framework from the ModelScope team.
  • ModelScope MCP Plaza Alibaba's MCP hub (魔搭社区), hosting free Streamable-HTTP servers for tools unreachable from Wes…
  • Gitee AI MCP integration on China's dominant code-hosting platform.
  • Zhipu Open Platform GLM model API platform with an agent and tool layer.
  • Aliyun Bailian Alibaba's model platform.
  • Baidu AI Cloud Baidu's model and agent platform.
  • Alipay Open Platform Ant Group's developer platform, and the home of its agent-payment suite (AI订阅 / AI按量付费 / Agen…
  • WeChat Pay Open Platform Tencent's payment rail and merchant platform.
  • Juejin /ai Active Chinese developer community channel for AI tooling.
  • ONDC Open Network for Digital Commerce, India's government-backed open commerce network.
  • Beckn Protocol The open protocol underneath ONDC.
  • NPCI / UPI The National Payments Corporation of India operates UPI, the highest-volume real-time payment…
  • Setu Fintech APIs for UPI, Bharat Bill Pay, Account Aggregator and KYC.
  • Razorpay One of India's largest payment processors, and among the first anywhere to ship an official M…
  • Cashfree Indian payments and payouts platform with a broad API surface.
  • Kakao Developers Developer platform for Korea's dominant messaging and payments ecosystem.

10 Frameworks & Middleware 17

  • machi Agent behavior that compiles.
  • aixyz Next.js-like framework for building payment-native AI agents.
  • x402-gateway-template Production-ready x402 gateway template.
  • monapi One-line API monetization SDK.
  • @moltrust/x402 Trust score middleware for x402 endpoints.
  • Azeth Provider Hono middleware for gating endpoints behind x402 with payment-agreement support for recurring…
  • x402-next App Router middleware for Next.js.
  • Next.js route protection Official complete Next.js app example with x402 payment gates.
  • Zuplo x402 API gateway with x402 paywalls.
  • FastAPI example Official complete FastAPI implementation with x402 payment middleware.
  • x402-rails Accept instant blockchain micropayments in Rails applications using x402.
  • astro-x402 Astro middleware integration for the x402 Payment Protocol.
  • x402-spring-boot-starter Protect Java APIs with pay-per-call logic using a single Spring Boot annotation.
  • nero-x402 First Account Abstraction-native x402 stack on NERO Chain.
  • Cloudflare Agents SDK v0.4.0 x402 v2 migration support: `ClientEvmSigner` type, auto-selection from payment requirements,…
  • x402-axum Axum web framework integration (part of [x402-rs](https://github.com/x402-rs/x402-rs)).
  • x402-reqwest Reqwest HTTP client wrapper (part of x402-rs).

11 Community 13

12 Market Data 6

  • agenteconomy.to Real-time dashboard tracking the agentic economy across x402, ERC-8004, ERC-8183, and MPP pro…
  • Dune Analytics x402 Comprehensive on-chain metrics: transaction volumes, chain analytics, facilitator comparison,…
  • x402scan Explorer Blockchain explorer for x402 payments.
  • Valoria x402 market intelligence.
  • CoinGecko x402 Category Token tracking and market data.
  • MCP Scores — Reliability register + x402 money-flow observatory over 36K+ MCP/x402 listings: observed USDC…

13 Aggregators & Proxies 3

  • Orders of Magnitude Unified pay-per-call access to 1,100+ public and utility API endpoints through one wallet.
  • Cleared Gateway POST router that returns the best Cleared-verified x402 endpoint for a task (category + strat…
  • 402Signal — Fail-closed live-endpoint x402 router.

505 listed · 484 dated · 4 in the graveyard · index generated at build, last knock

Nothing here is pay‑to‑list. A service earns its spot through a pull request that a human reads and an endpoint that answers. Reading is never gated — this page is static, free, and needs no key. Submission terms · About · llms.txt